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• Three trigonometric functions are readily available in the keyboard: sine
(S), cosine (T), and tangent (U). Arguments of these functions
are angles in either degrees, radians, grades. The following examples
use angles in degrees (DEG):
In ALG mode:
In RPN mode:
• The inverse trigonometric functions available in the keyboard are the
arcsine („¼), arccosine („¾), and arctangent („À).
The answer from these functions will be given in the selected angular
measure (DEG, RAD, GRD). Some examples are shown next:
In ALG mode:
In RPN mode:
All the functions described above, namely, ABS, SQ, , ^, XROOT, LOG,
ALOG, LN, EXP, SIN, COS, TAN, ASIN, ACOS, ATAN, can be combined
with the fundamental operations (+-*/) to form more complex
expressions.
The Equation Writer, whose operations is described in
Chapter 2, is ideal for building such expressions, regardless of the
calculator operation mode.
2.45`‚¹
2.3\`„¸
S30`
T45`
U135`
30S
45T
135U
„¼0.25`
„¾0.85`
„À1.35`
0.25„¼
0.85„¾
1.35„À
Page 3-4

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